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Search / Trial NCT06768697

Safety and Immunogenicity Evaluation of the Recombinant Flagellin Protein Adjuvant

Launched by SHANGHAI PUBLIC HEALTH CLINICAL CENTER · Jan 6, 2025

Trial Information

Current as of July 09, 2025

Not yet recruiting

Keywords

Adjuvant Novel Adjuvant Flagellin Mucosal Vaccine Sars Co V 2

ClinConnect Summary

This clinical trial is designed to test a new COVID-19 vaccine that uses a special protein to help boost the body's immune response. The main goal is to find out if this vaccine can effectively prevent COVID-19 infection and to check how safe it is for participants. The trial is not yet recruiting participants, but when it begins, it will focus on healthy adults aged 18 to 65 who have received 2 to 3 doses of a COVID-19 vaccine at least six months prior. It's important that participants have not had a COVID-19 infection in the last three months.

If you qualify and decide to participate, you will need to agree to some guidelines, such as using non-drug contraceptive methods during the trial. Participants will receive the vaccine and will be monitored for any side effects or reactions. This research is crucial in helping to develop effective vaccines against COVID-19, so your involvement could contribute to better protection for everyone.

Gender

ALL

Eligibility criteria

  • Inclusion Criteria:
  • 1. The subjects are healthy individuals aged between 18 and 65 years old (inclusive), with no gender preference, ensuring an appropriate gender ratio.
  • 2. Have received 2-3 doses of COVID-19 inactivated vaccine, and the last dose was administered more than 6 months ago.
  • 3. Have not been infected with COVID-19 within 3 months.
  • 4. Capable of being used in conjunction with nasal sprays, and also suitable for nasal irrigation, saliva collection, and blood collection.
  • 5. Male subjects and their partners, or female subjects, must agree to adopt one or more non-drug contraceptive measures (such as complete abstinence, condoms, intrauterine devices, partner sterilization, etc.) during the trial period and for six months after the trial ends, and they must not have plans for sperm donation or egg donation.
  • 6. The subjects fully understand the purpose, nature, methods, and possible adverse reactions of the trial, voluntarily participate in the trial, and sign the informed consent form.
  • 7. The subject is able to communicate effectively with the researcher and complete the study in accordance with the protocol.
  • Exclusion Criteria:
  • 1. Active or suspected viral, bacterial, fungal, or parasitic infections, including herpes, shingles, or cold sores, within 14 days prior to screening.
  • 2. History of recurrent infections of unknown causes; or use of systemic antibiotics within 90 days prior to drug administration.
  • 3. Individuals with malignant tumors or a history of malignant tumors, except for non-melanoma skin cancer that has been cured for more than 3 years.
  • 4. Nasal malformation, trauma, or other reasons that make it impossible to use nasal sprays.
  • 5. Individuals with a history of allergy to biological agents or any drug components; individuals with a history of allergies, such as asthma, aspergillus infection, allergic rhinitis, etc., who have been determined by researchers to be unsuitable for enrollment.
  • 6. Screen for outpatient or inpatient history of clinically significant chronic or acute disease symptoms within the previous 3 months, and ensure no surgical plans during the study period.
  • 7. Previous tests have found HIV-Ab positive, HCV positive, and anti-syphilis helical-specific antibody positive (please consult the subject).
  • 8. Individuals with abnormal vital signs (refer to normal range: systolic blood pressure 90\~139mmHg, diastolic blood pressure 60\~89mmHg, pulse rate 55-100 beats/min; body temperature (ear temperature) 35.4-37.7℃; respiratory rate 16-20 breaths/min) or abnormal electrocardiogram (QTcB≥450 ms, QTcB= QT/RR0.5) or clinically significant abnormalities in physical examination, laboratory tests (subject to the judgment of the clinical research doctor).
  • 9. Screen for the use of other medications, including prescription or non-prescription drugs, and herbal remedies, within the previous 4 weeks.
  • 10. Screen for individuals who have received vaccination within the previous 4 weeks or plan to receive vaccination during the study period.
  • 11. Individuals with a history of significant allergic reactions (anaphylaxis or angioedema) to any products (such as food and drugs), and known to be allergic to the test drug, its excipients, or similar drugs.
  • 12. Participate in any other drug clinical trials within 3 months before screening or within 5 half-lives of other clinical trial drugs (choose the longer time period).
  • 13. Exclude individuals who have donated plasma or whole blood exceeding 200 mL within the previous 3 months, except during menstruation.
  • 14. Individuals who abuse drugs or have used soft drugs (such as marijuana) within the past 3 months, or have consumed hard drugs (such as cocaine, phencyclidine, etc.) within the year prior to the trial; or individuals who test positive for drug abuse in urine screening (including methamphetamine, ketamine, MDMA, marijuana, morphine).
  • 15. Individuals who are alcoholics or have regularly consumed alcohol within the 6 months prior to the trial, with an average weekly alcohol intake exceeding 14 units (1 unit of alcohol is equivalent to approximately 360 mL of beer, 45 mL of spirits with a 40% alcohol content, or 150 mL of wine), or those who cannot abstain from alcohol during the trial period (interview).
  • 16. Subjects who have smoked an average of more than 5 cigarettes per day or used other nicotine-containing products (such as nicotine patches, nicotine gum, e-cigarettes, etc.) more than 5 times per day on average within the previous 3 months, or who cannot stop using any tobacco-related products during the trial period.
  • 17. Those who have previously or currently suffered from any clinically severe diseases of the circulatory system, endocrine system, nervous system, digestive system, respiratory system, urogenital system, hematology, immunology, psychiatry, or metabolic abnormalities, or any other diseases that may interfere with the results of the trial.
  • 18. Use other medications, including prescription or non-prescription drugs, and Chinese herbal medicine, from the screening date to D1.
  • 19. Women who are pregnant, breastfeeding, or may become pregnant.
  • 20. Clinical diagnosis of any autoimmune disease or rheumatic disease.
  • 21. The patient's blood COVID-19 specific IgG antibody is greater than 1×10e4.
  • 22. Any situation that other researchers consider unsuitable for participation in the study.
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About Shanghai Public Health Clinical Center

The Shanghai Public Health Clinical Center is a leading healthcare institution dedicated to advancing public health through innovative clinical research and trials. Renowned for its commitment to patient safety and ethical standards, the center specializes in a wide range of clinical studies aimed at improving disease prevention, diagnosis, and treatment. With a multidisciplinary team of experienced healthcare professionals and researchers, the center leverages cutting-edge technologies and methodologies to facilitate impactful research that addresses pressing public health challenges. By fostering collaboration with academic institutions and industry partners, the Shanghai Public Health Clinical Center plays a pivotal role in contributing to the global body of medical knowledge and enhancing health outcomes within the community.

Locations

Shanghai, Jinshan District, China

Patients applied

0 patients applied

Timeline

First submit

Trial launched

Trial updated

Estimated completion

Not reported